AM_Calcite_8 Formula: (Ca.936 Mg.064) C O3 Name: Calcite Unit cell: 4.9673 4.9673 16.9631 90.0 90.0 120.0 , V=362.47 Space group: R-32/C (1)

Paquette J , Reeder R J , American Mineralogist , 75 (1990) p.1151-1158, Single-crystal X-ray structure refinements of two biogenic magnesian calcite, crystals, sample LS